Graco EM 490 Instructions-Parts List Manual page 5

2. Fill the packing nut/wet–cup 1/3 full with Graco
Throat Seal Liquid (TSL), supplied. See Fig 2.
3. Check the electrical service.
a. The motor is factory wired for 220 V. To rewire the
motor for 110 V, unplug the sprayer, remove the
cover plate of the voltage change box (located on
the left side of the motor) and rewire the motor as
shown in Fig 3. Also see Fig 2.
b. Be sure the electrical service is properly rated for
your sprayer and that the outlet you use is prop-
erly grounded.
c. Have a licensed electrician attach an appropriate
plug to the power supply cord.
d. Use a grounded extension cord which has 3 wires
of a minimum 2.5 mm (12 gauge) size, and a
maximum of 30 m (100 ft) long. Longer lengths or
smaller gauges may af
performance.
WARNING
Proper grounding is essential to reduce the risk of
static sparking which can cause a fire or explosion
and result in serious bodily injury and property
damage.
Read the warning section FIRE OR EXPLOSION
HAZARD on page 3 of this manual and ground the
sprayer as explained there.
4. Plug in the sprayer. Be sure the ON/OFF switch is
OFF. See Fig 4. Plug the power supply cord into a
grounded electrical outlet that is at least 6 m
(20 ft) away from the spray area to reduce the chance
of a spark igniting the spray vapors.
5. Flush the pump to remove the lightweight oil which
was left in to protect pump parts after factory testing.
See FLUSHING GUIDELINES on page 9.
6. Prepare the paint according to the manufacturer 's
recommendations.
Remove any skin that may have formed. Stir the paint
to dissolve pigments. Strain the paint through a fine
nylon mesh bag (available at most paint dealers) to
remove particles that could clog the filter or spray tip.
This is probably the most important step toward
trouble–free spray painting.
SETUP
VOLTAGE CHANGE BOX
LOCATED ON THIS SIDE
PACKING NUT/
WET CUP
Fig 7–2
fect sprayer LOW VOLTAGE – 110 V
BROWN
BLUE
BLACK
BLUE
GRAY
YELLOW
Fig 7–3
Fig 7–4
OF MOTOR
HIGH VOLTAGE – 220 V
PINK
#2
BROWN
YELLOW
#3
0114
#3
#2
PINK
GRAY
BLACK
BLUE
BLUE
0115
ON/OFF
SWITCH
PRESSURE
ADJUSTING
KNOB
0116